| Value | Category | Cases | |
|---|---|---|---|
| 12 | 12 | 17 |
1.4%
|
| 13 | 13 | 41 |
3.4%
|
| 14 | 14 | 172 |
14.2%
|
| 15 | 15 | 263 |
21.8%
|
| 16 | 16 | 242 |
20%
|
| 17 | 17 | 127 |
10.5%
|
| 18 | 18 | 70 |
5.8%
|
| 19 | 19 | 41 |
3.4%
|
| 20 | 20 | 38 |
3.1%
|
| 21 | 21 | 198 |
16.4%
|
| -4 | Not asked | 0 | |
| -3 | Not applicable | 19 | |
| -2 | No answer | 0 |